*{
    margin: 0;
    padding: 0;
}

html, body{
    margin: 0;
    height: 100%;
}

#myCanvas{
    position: absolute;
    z-index: 1;
}

#div-container{
    position: absolute;
    z-index: 2;
}

.container{
    height: 262px;
    width: 360px;
    border-radius: 10px;
    position: absolute;
    display: flex;
    flex-wrap: wrap;
    /* 两端对齐 */
    justify-content: space-between;
    background-image: linear-gradient(-45deg, #17213ea8, #09203fa8, #537895a8, #006970a8, #007c5fa8);
    /*background-size: 5px 30px, 30px 5px;*/
    background-repeat: no-repeat;
    background-size: 400% 400%;
    animation: gradientBG 10s ease infinite;
    top: 0;
    bottom: 0;
    right: 0;
    left: 0;
    margin: auto;
}
@keyframes gradientBG{
    0% {
    background-position: 0 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0 50%;
    }
}